Photographic-roll holder.



.No. 689,751. Patented Dec. 24, l90l.

.1. A. noaamsou. PHOTDGRAPHIC ROLL HOLDER.

(Applicatioq filed Feb. 1, 1901.) (No Model.) 2 Sheets-Shea; l.

1N0. 689,75l. Patented Dec. 24, I90].

J. A. ROBERTSON.

PHOTOGRAPH") ROLL HOLDER.

(Application filed Feb. 1I 1901.)

(No Model.) 2 Sheets-Sheet 2.

. UNITED STATES PATENT OFFICE.

JOHN A. ROBERTSON, OF ROCHESTER, NEW YORK, ASSIGNOR TO HARVEY B.CARLTON, OF ROCHESTER, NEW YORK.

PHOTOG RAPH lC-ROLL HO LD ER.

SPECIFICATION formingpart of Letters lPatent N 0. 689,751, datedDecember 24, 1 901. Application filed February 1, 1901. Serial No.45.643. (N model.)

T0 60 whom, it may concern: accompanying drawings, illustrating-my in-Be it known that I, JOHN .A. ROBERTSON, a vention. That which I regardas new will be citizen of the United States, residing at Rochset forth"in vthe claims following the specifiester, in the county of Monroe andState of cation. 5 New York, have invented new and usefulIm- In thedrawings, Figure 1 is a perspective provements in Photographic-RollHolders, of view of the roll-holder; Fig. 2, a sectional which thefollowing is a specification. plan View; Fig. 3,'a section on the line 33 of My invention relates to improvements in Fig. 1; Fig. 4, a detailview illustrating the mechanism for regulating or controlling themannerot' mounting the film-spool and take- 60 IO presentation forexposure of a measured or up roll. Fig. 5 is a perspective view of thedetermined quantity of surface of a sensistop meohanism,showing the sameoutof optized film carried by a spool upon which it is oration; Fig. 6,a detail of the lever and Wound and from whichitis to be unwound and theparts carried thereby. Fig. 7 is an endafter exposure wound upon atake-up roll. detailviewshowing the relative position ofthe 65 Theinvention is exhibited in this .applicaparts when the stop mechanism hasacted and tion embodied in a'roll-holder for cameras locks thefilm-spool from rotation. Figs. 8, adapted to be secured to thecamera-box'as, 9, and 10 are details of a modified arrangefor, instance,a dry-plate camera-boxin any ment of stop mechanism. usual or knownmanner; but itwill be under- Referring to the drawings, the numeral 1 7o2o stood that the invention maybe equally emindicatesarolhholder forcameras consisting bodied withthe box or case of a film-camera. of abase 2, which is adapted by any usual or My invention has for its objectto provide known means, such as the pins, 1 or othermechanismcooperating with the film to auwise, to be connected to the camera boxor tomaticallyvlock the film-spool from rotation case. It is providedwith a film-plane 3, 75 at intervals, whereby a measured quantity, whichlies across the exposing-chamber of the but no more, of the film may bewithdrawn camera and in front of which the film 4 passes from the spooland presented for exposure. in being presented for exposure and exposed.The invention has for its object also to pro- At the rear of thefilm-plane are arranged the vide an indicator for indicating the numbermeans for mounting the film-spool and take- 80 of exposures ornegative-surfaces which have uproll, which preferably consist of a pairof been unwound from the film-spool and which spring-hinged standards 5,arranged at the is operated automatically by the same movelower end ofthe film-plane and at the oppoment which releases the film from theinflusite side edges thereof, and these standards ence of thecontrolling mechanism. are provided with stud-journals 6, that fit into85 My invention aliords a means whereby a axial sockets 7 of thefilm-carriers, of which special tension device suchas has beenhere- Sisthe film-spool and 9 the take-up roll. The

tofore usual in the operation of exposing a opposite ends of said spooland roll are procontinuous film is dispensed with and aposi vided withlug-recesses 10, which receive an- I tive automatic stopping'or lockin gof the filmgular lugs 11, projecting from ratchet-wheels 9o 40 spooleffected when the requisite measure of 12 and 13, rotatably mounted instationary film has been unwound therefrom, thus instandards 14, andthus the film-spool and suring the presentation accurately forexpotake-up roll are supported and properly censure of the propermeasure of film-surface tered for rotation and true feed of the sensiandlocking the further unwinding of the film tized film. The film 4 isprovided at inter- 95 until the latter has been released from the valsalong oneof its longitudinal edges with controlling mechanism by thepositive act of recesses 16, which-I term stop-assisters, the theoperator. same being arranged at equal distances apart To the attainmentof the objects stated the and serving to mark out the line of divisioninvention consists in thenovel combination, between the consecutiveexposures of nega- I00 arrangement, and operation of parts hereintivesurface, as well as to cooperate with the after set forth, referencebeing made to the controlling mechanism, to prevent rotation of thefilm-spool after the requisite quantity of film has been unwound in themanner hereinafter described. The film is wound upon the spool whenintroduced into the roll-holder, i

- a slot 18 at the other side of said support, and

then connected with the take-up roll in any suitable or known manner.The film is now ready to be unwound from the film-spool onto the take-uproll in regulated or measured quantities of surface, according to thedimensions of the negative orin tervals between the stop-assisters 16,by means of a suitable key K engaging the take-up roll. The springhingedstandards 5 permit their studs to be readily withdrawn from the socketsof the film-spool and take-up roll, so that new ones may be substitutedwhen necessary.

The base of the roll-holderis provided with a slideway 19 in front ofthe film-plane in which, if desired, an exposing or dark slide 20 may bereceived;

The ratchet-wheel 12 of the take-up roll is engaged by a spring-pressedpawl 21, carried by the standard, whereby take-up rotation of the rollis permitted, but rotation in an opposite direction is prevented.

My invention resides in means for regulating or controlling theunwinding presentation for exposure of certain definite or meas- 11 redquantities of film-surface and automatically locking one of thefilm-carriers from rotation when such quantity has been unwoundtherefrom.

I have illustrated two specifically diiferent forms of such mechanism,the preferred one of which will now be described as applied in operativerelation to the film spool. The film-plane 3 is countersunk to provide aseat to accommodate the. plate 22, which carries the moving parts of theregulating or controlling mechanism. To the plate is pivoted at a pointintermediate its ends, as at 23, a lever 24, to which at one side of thepivot is connected a push pin 25, that projects through the frame of theroll-holder base in convenient reach to be actuated by the ho tographer.The other end of said lever is provided or formed with alaterally-extending finger 26 and adjacent thereto with a dog 27,adapted to engage the teeth of the filmthrough the medium of its angularlug prespool ratchet and prevent rotation thereof and venting rotationof the film-spool also. The mechanism described is located at one sideof the path traveled by the film, or, in other the other end against asimilarabutment 30 on the lever 24. The dog is held out of'engagementwith said ratchet to permit the rotation of the film-spool by the finger26 riding upon the edge of the film, as shown in the drawings, and onlyenters into engagement therewith at intervals when in the passage of thefilm a stop-recess 16, formed in the film, comes opposite the finger,and at this point the finger enters the recess under the in fiuence ofthe spring 28, permitting the dog to come into engagement with the teethof the ratchet. When the dog is so in engagement with the ratchet, itwill be apparent that the film-spool cannot be further rotated, andconsequently further Withdrawal of the film from the spool is prohibiteduntil the engagement of the dog with the ratchet-wheel is released bythe operator. The photographer is now enabled by rotating or partiallyrotating the take-up roll to take up any slack that may exist betweenthe engaged stop-assister and said roll to present the negative or ex,-posure-space taut and smooth for the exposure. When a givenexposure-surface or negative is properly presented in front of thefilm-plane for exposure, the exposure accomplished, and it is desired topresent a new surface for exposure, the engagement of the dog with theratchet of the film-spool is re leased by pressing upon the push-pin 25.This action not only moves the dog out of engagement with the ratchet,but also the finger 26 out of the stop-assister recess in the determinedby the position of the next stop-as-',

sister recess, to be presented for exposure,

whereupon the lever-spring forces the finger to enter the recess and thepawl to engage with the film-spool ratchet, preventing its furtherrotation, as before described. In this pre* ferred form of myinventionan indicator-disk 32 is arranged in the undercut of the film-plane 3 andis fixedly mounted upon an axle 33, projecting through the plate 22, aratchet 34 being fixed upon said axle on the opposite side of the plate.The indicator-disk is provided with a series of numerals which arevisible through a sight-hole 35 in the plate, with which a correspondingsight-hole 36, formed in the cover 37 of the rollholder, registers. Thesight-hole in the cover is formed by drawing in the material of thecover, which preferably is of metal, the outstanding rim 38 of saidsight hole projecting into the sight-hole of the plate for the purposeof preventing possibility of entrance of light into the interior of therollholder. The indicator-disk is rotated periodically by means of aspring-pressed arm 39, carried by the lever 24, which acts upon theteeth of the-indicator-ratchet when the pushpin is operated to releasethe film-spool from I the engagement of the dog. The photographer mayinform himself of the number of exposures made or of the exhaustion ofthe film by observing the indicator-disk through the registeringsight-holes. I

In the modified form of my invention, (illustrated in Figs. 8,- 9, andlOof the drawings.

film, with the dog 27 out of engagement with the teeth under theinfluence of spring 28. In the unwinding of the film in this arrangementwhen the said assister projection 40 arrives at the finger the latterwill ride out onthe cam-face thereof and in such movement throw the dog27 into engagement with the ratchet-wheel teeth, locking'thefilm-spooland preventing further unwinding of the film, as heretofore explained.To release the dog from the film-spool ratchet, the push-pin is moved towithdraw the dog from the teeth of the ratchet, pushing thestop-assisterlprojection aside. The parts being held momen tarily inthis position with the film-spool free to rotate, the film can beunwound until the projection has passed the finger, whereupon theoperating push-pin is released and the parts assume their formerposition with the finger riding on the edge of the film and a newsurface is unwound and presented for exposure, the unwinding beinglimited by the finger meeting the succeeding arrest-er projection. Thisoperation is repeated after each exposure until the film is exhausted.In this form of my invention the indicator mechanism is the same as thatdescribed hereinbefore and is operated by means of an arm 39*, connectedwith the lever 24 at the end opposite the finger 26*. Each time the saidfinger rides out upon the projection 40 the opposite end thereof isoscillated inward and the arm 39 moves the ratchet 34 one tooth, andconsequently the indicator-disk,

as hereinbefore described.

In either form of my invention, if it is desired, the indicatingmechanism may be omitted, in which event the film would be provided withindications on its back or unsensitized face, which indications would beviewed through registering peep-holes 41 in the film-plane androll-holder cover, the latter holes taking the place of thesight-openings 36.

My improved locking means while shown in the drawings as applied toengage with the film-delivery spool may be applied to the take-up orwinding-up roll without modification of such means and by merelyreversing the position of the parts. I do not, therefore, wish toconfine my invention to the locking means applied to engage the filmdeliver'y spool, except where in the following claims it is specificallydescribed as on gaging such filmdelivery spool.

Having thus described my invention, what I claim is I 1. The combinationwith a film-carrier, of locking means therefor located at one side ofthe path of film travel and arranged and adapted to ride along and bearagainst the edge of the film, substantially asdescribed.

2. The combination with a film-carrier, of locking means thereforlocated at one side of the path of film travel, and arranged and adaptedto ride on the edge of the film and to cooperate with stop-assisterswith which the edge of the film is provided, substantially as described.

3. The combination with a film-carrier, of

spring-pressed locking means therefor locatedat one side of the path offilm travel and arranged and adapted to ride on the edge of the film andto enter stop-assister recesses in the edge of the film,substantially asdescribed.

4'. A means for arresting and locking the movement of a photographicfilm, located at one side of the film travel and comprising a leverprovided with a finger to ride along the edge of the film and engagestop-assisters with which the film is provided, and provided also withmeans for engaging a film-carrier and locking it from rotation,substantially as described.

5. A means for arresting themovement of a photographic film located atone side of the film travel and comprising a lever provided with afinger adapted to ride along the edge of the film and engagestop-assisters with which the film is provided, and a dog to engage afilm-carrier, substantially as described.

6. A means for arresting and looking the movement of a photographicfilm, located at one side of the film travel and comprising a fingerarranged and adapted to ride along the edge of the film and engagestop-assisters with which the latter is provided, and means for engaginga film-carrier and locking it from rotation, substantially as described.

7. The combination with a film -carrier adapted to contain a filmprovided with stopassisters, means located at one side of the filmtravel arranged and adapted to ride along the operating with saidstop-assisters to engage the ratchet and lock the spool from rotation,substantially as described.

10. The combination with a film deliveryspool adapted to carry a filmhaving stop-assisters, of means adapted to ride on the edge of the filmfor engaging said stop-assisters and spool and automatically locking thespool from rotation, substantially as described.

11. The combination with a film deliveryspool provided with a ratchetand adapted to carry a film having stop-assisters, of means bearingagainst the edge of the film for engaging said stop-assisters and saidratchet to lock the spool from rotation, substantially as described.

12. The combination with a film deliveryspool adapted to carry a filmprovided with stop-assisters, of means held out of engagement With thespool by the edge of the film and adapted to cooperate with saidstop-assisters to engage and lock the spool from rotation, substantiallyas described.

13. The combination with a film deliveryspool provided with a ratchetand adapted to carry a film having stop-assisters, of means held out ofengagement with the spool-ratchet by the edge of the film, and adaptedto cooperate with the stop-assisters to engage the ratchet and lock thespool from rotation, substantially as described.

14:- The combination with a film deliverysp'dol adapted to carry a filmprovided with stop-assisters, of a finger bearing against the edge ofthe film for engaging said stop-assisters, and a dog for engaging thespool when the finger is in engagement with one of the stop-assisters,whereby the rotation of the spool is stopped, substantially asdescribed.

15. The combination with a film-carrier adapted to hold a film providedwith stop-assisters, of a lever havinga dog to engage said carrier and afinger to engage said stop-assisters, substantially as described.

16. The combination with a film-carrier provided with a ratchet andadapted to hold a film provided with stop-assisters, of a lever providedwith a dog for engaging said ratchet and a finger for engaging saidstop-assisters, substantially as described.

17. The combination with a film-carrier provided with a ratchet andadapted to hold a film provided with stop-assisters,and a springactuatedlever provided with a dog for engaging said ratchet and a finger forengaging said stop-assisters, substantially as described. 18. Thecombination with a film-carrier provided with a ratchet and adapted tohold a .ing said dog and finger from engagement with the ratchet andstop-assisters, substantially as described.

19. The combination with a film -carrier adapted to hold a film providedwith stop-assisters, of a spring-actuated lever provided at one end witha device for engaging said can rier and a device for engaging saidstop-assisters, and a push-pin at the opposite end of .the lever forwithdrawing's-aid device from engagement, substantially as described.

20. Thecombinationwithafilm-carrierpro= vided with a ratchet, andadapted to hold a film having stop-as'sister recesses, ofaspringactuated lever provided with a finger for engaging the saidrecesses, and a dog for engaging the carrier-ratchet, said fingernormally riding upon the edge of the film and holding the dog out ofengagement with the ratchet and engaging said recesses at intervals topermit the dog to engage said ratchet under the influence of the springand lock the spool from operation, substantially as described.

21. The combination with a film-carrier and a ratchet connectedtherewith, of alever provided with a finger cooperating with the filmand further provided with a dog adapted to engage said ratchet,substantially as and for the purpose described.

22. The lever provided with the finger and dog for cooperation with aphotographic film and film-carrier and the arm for actuating indicatingmechanism.

23. The combination with a film-carrier, and indicating mechanism, of alever provided with a finger to cooperatewith the film, a dog to engagethe film-carrier, and an arm to actuate the indicating mechanism.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN A. ROBERTSON.

Vitnesses:

E. O. I-IAsKIN, H. CARLTON.

